private byte[] md5(String strSrc){
  byte[] returnByte = null;
  try{
      MessageDigest md5 = MessageDigest.getInstance("MD5");
      returnByte = md5.digest(strSrc.getBytes("UTF8"));
   }catch(Exception e){
      e.printStackTrace();
  }
  return returnByte;
 }
 
 public String getBase64Encode(byte[] src){
    String requestValue="";
    try{
   BASE64Encoder base64en =  new BASE64Encoder();
   requestValue = base64en.encode(src);
  }catch(Exception e){
   e.printStackTrace();
  }
    return requestValue;
 }